experiments/lib: call reconfigure on every new commit

Some build systems need a reconfigure. However, we do not want to
measure that, since it is single threaded and way too slow.

experiments/historical_build.py

@@ -73,8 +73,7 @@ class HistoricalCompilation(Experiment, ClangHashHelper):
             for commit in commits:
                 shell("cd %s; git reset --hard %s", src_path, commit[0])
                 info = {"commit": commit[0], "summary": commit[1]}
-                if self.project_name() == "lua":
-                    self.call_configure(src_path)
+                self.call_reconfigure(src_path)
                 self.rebuild(src_path, info, fail_ok=True)
                 self.build_info["builds"].append(info)
                 if not info.get("failed"):

experiments/lib.py

@@ -68,6 +68,12 @@ class ClangHashHelper:
         else:
             raise RuntimeError("Not a valid project")
 
+    def call_reconfigure(self, path):
+        if self.project_name() in ('lua',):
+            self.call_configure(path)
+        if self.project_name() in ('cpython',):
+            shell("cd %s/build; make config.status", path)
+
     def call_make(self, path):
         if self.project_name() in ("mbedtls", "cpython"):
             return shell("cd %s/build; make -j %s", path, str(self.jobs.value))